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San diego gumplant (Grindelia hallii)

CaPR partner San Diego Zoo Global made the first collection of this rare 1B species, San Diego gumplant (Grindelia hallii) in 2018. Photo credit: Stacy Anderson, courtesy of San Diego Zoo Global.

Photo Credit: Stacy Anderson
  • Global Rank: N/A
  • Legal Status: N/A
  • Family: Asteraceae
  • State: CA
  • Nature Serve ID:
  • Date Inducted in National Collection:

Grindelia hirsutula var. hallii is a North American species of flowering plant in the daisy family. The species is highly variable, and many local populations have been named as varieties or as distinct species. All these taxa do, however, intergrade with one another. Grindelia hirsutula var. hallii is an erect perennial herb or subshrub sometimes as much as 250 cm (100 inches or 8 1/3 feet) tall but usually much shorter. The plant is usually green but the stems are often red or purplish-brown and the leaves can be somewhat yellowish to reddish. The plant can produce numerous flower heads in branching arrays at the top of the plant. The blooming period is July to October. Each head is 2 or 3 centimeters (0. 8-1. 2 inches) wide with hemispheric cups of greenish phyllaries around the base, the bracts claw-like and bent away from the flowers. The center of the head is filled with many small yellow disc florets surround by numerous golden ray florets. The head produces a thick white exudate, especially in new flower heads (Calscape).

Where is San diego gumplant (Grindelia hallii) located in the wild?


Grindelia hallii occurs in chaparral, Lower montane coniferous forest, Meadows and seeps,and Valley and foothill grassland. Elevation 1500 to 5500 feet (CNPS)


Grindelia hallii is endemic to California (San Diego co.), primarily in the Cuyamaca Mountains (NatureServe 2018).

States & Provinces:

San diego gumplant can be found in California

Which CPC Partners conserve San diego gumplant (Grindelia hallii)?

CPC's Plant Sponsorship Program provides long term stewardship of rare plants in our National Collection. We are so grateful for all our donors who have made the Plant Sponsorship Program so successful. We are in the process of acknowledging all our wonderful plant sponsorship donors on our website. This is a work in progress and will be updated regularly.

Conservation Actions

  • 09/01/2020
  • Orthodox Seed Banking

Based on an September 2020 extract of the California Plant Rescue Database, San Diego Zoo Global holds 2 accessions of Grindelia hallii in orthodox seed collection. There are as many as 25719 seeds of this species in their collection - although some may have been used for curation testing or sent to back up.

  • 08/05/2020
  • Seed Collection

Based on an August 2020 extract of the California Plant Rescue Database, San Diego Zoo Global has collected 2 seed accessions of Grindelia hallii from 2 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass 219 maternal plants

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Taxon Grindelia hallii
Authority Steyermark ex Rothrock
Family Asteraceae
CPC Number 2080
ITIS 37449
Common Names
Associated Scientific Names Grindelia hallii
Distribution Grindelia hallii is endemic to California (San Diego co.), primarily in the Cuyamaca Mountains (NatureServe 2018).
State Rank
State State Rank
Ecological Relationships


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